The N/O evolution on galaxies:the role played by the star formation history
Abstract
We study the evolution of nitrogen resulting from a set of spiral and irregular galaxy models computed for a large number of input mass radial distributions and with various star formation efficiencies. We show that our models produce a nitrogen abundance evolution in good agreement with the observational data. In particular, low N/O values for high-redshift objects, such as those obtained for Damped Lyman Alpha galaxies can be obtained with our models simultaneously to higher and constant values of N/O as those observed for irregular and dwarf galaxies, at the same low oxygen abundances dex. The differences in the star formation histories of the regions and galaxies modeled are essential to reproduce the observational data in the N/O-O/H plane.
Cite
@article{arxiv.astro-ph/0701691,
title = {The N/O evolution on galaxies:the role played by the star formation history},
author = {Mercedes Mollá and José M. Vílchez and Angeles I. Díaz and Marta Gavilán},
journal= {arXiv preprint arXiv:astro-ph/0701691},
year = {2016}
}
Comments
7 pages, 5 figures. contribution to the conference Metal Rich Universe, Eds. G. Israelian & G. Meynet, Cambridge University Press